[Sommaire] [Imprimer]

   1  <?php
   2  //
   3  // Example of frequence bar 
   4  //
   5  include_once  ("../jpgraph.php");
   6  include_once  ("../jpgraph_bar.php");
   7  include_once  ("../jpgraph_line.php");
   8  
   9  // Utility function to calculate the accumulated frequence
  10  // for a set of values and ocurrences
  11  function accfreq($data) {
  12      rsort($data);
  13      $s = array_sum($data);
  14      $as = array($data[0]);
  15      $asp = array(100*$as[0]/$s);
  16      $n = count($data);
  17      for( $i=1; $i < $n; ++$i ) {
  18      $as[$i] = $as[$i-1]+$data[$i];
  19      $asp[$i] = 100.0*$as[$i]/$s;
  20      }
  21      return $asp;
  22  }
  23  
  24  // some data
  25  $data_freq = array(22,20,12,10,5,4,2);
  26  $data_accfreq = accfreq($data_freq);
  27  
  28  // Create the graph. 
  29  $graph = new Graph(350,250);
  30  
  31  // Setup some basic graph parameters
  32  $graph->SetScale("textlin");
  33  $graph->SetY2Scale('lin',0,100);
  34  $graph->img->SetMargin(50,70,30,40);
  35  $graph->yaxis->SetTitleMargin(30);
  36  $graph->SetMarginColor('#EEEEEE');
  37  
  38  // Setup titles and fonts
  39  $graph->title->Set("Frequence plot");
  40  $graph->xaxis->title->Set("X-title");
  41  $graph->yaxis->title->Set("Y-title");
  42  
  43  $graph->title->SetFont(FF_FONT1,FS_BOLD);
  44  $graph->yaxis->title->SetFont(FF_FONT1,FS_BOLD);
  45  $graph->xaxis->title->SetFont(FF_FONT1,FS_BOLD);
  46  
  47  // Turn the tickmarks
  48  $graph->xaxis->SetTickSide(SIDE_DOWN);
  49  $graph->yaxis->SetTickSide(SIDE_LEFT);
  50  
  51  $graph->y2axis->SetTickSide(SIDE_RIGHT);
  52  $graph->y2axis->SetColor('black','blue');
  53  $graph->y2axis->SetLabelFormat('%3d.0%%');
  54  
  55  // Create a bar pot
  56  $bplot = new BarPlot($data_freq);
  57  
  58  // Create accumulative graph
  59  $lplot = new LinePlot($data_accfreq);
  60  
  61  // We want the line plot data point in the middle of the bars
  62  $lplot->SetBarCenter();
  63  
  64  // Use transperancy
  65  $lplot->SetFillColor('lightblue@0.6');
  66  $lplot->SetColor('blue@0.6');
  67  $graph->AddY2($lplot);
  68  
  69  // Setup the bars
  70  $bplot->SetFillColor("orange@0.2");
  71  $bplot->SetValuePos('center');
  72  $bplot->value->SetFormat("%d");
  73  $bplot->value->SetFont(FF_ARIAL,FS_NORMAL,9);
  74  $bplot->value->Show();
  75  
  76  // Add it to the graph
  77  $graph->Add($bplot);
  78  
  79  // Send back the HTML page which will call this script again
  80  // to retrieve the image.
  81  $graph->Stroke();
  82  
  83  ?>